Blessed Pierre-Joseph Cassant O.C.S.O.(†1903) was a French Roman Catholic priest and professed member of the Trappists who received the religious name of Marie-Joseph. He was known for his strong determination to his studies to fulfill his lifelong wish of being ordained to the priesthood. Cassant suffered from extreme tuberculosis around the time of his ordination and died not long after he was made a priest. Pope John Paul II celebrated his beatification on 3 October 2004 and his feast day is celebrated on 17 June.